I don't know much about Oddo either, though anytime I hear his name, I think of Star Trek. Yes, I am a dork.
Anyway, as backups go, you can't ask for one better since right now, Reveillere is still the #1 RB. He might not be at the form that he had two years ago, but he brings CL winning experience, and at 32, a great deal of maturity as well. Lyon are such a young squad that there are only three players 30 and over at the moment - Juni, Grosso, and Cris. So Oddo would help balance that out.
Plus Lyon are banking on Clerc returning to form, hence the loan. At the end of the year, either Oddo returns to Italy or Reveillere leaves.
EDIT: Now rumors are that Oddo will be signing with Bayern./
